mirror of
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115 lines
3.1 KiB
Go
115 lines
3.1 KiB
Go
/*
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This file is part of go-ethereum
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go-ethereum is free software: you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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go-ethereum is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with go-ethereum. If not, see <http://www.gnu.org/licenses/>.
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*/
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/**
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* @authors
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* Gustav Simonsson <gustav.simonsson@gmail.com>
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* @date 2015
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*
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*/
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package crypto
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import (
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"code.google.com/p/go-uuid/uuid"
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"encoding/json"
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"fmt"
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"io"
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"io/ioutil"
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"os"
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"os/user"
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"path"
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)
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// TODO: rename to KeyStore when replacing existing KeyStore
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type KeyStore2 interface {
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// create new key using io.Reader entropy source and optionally using auth string
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GenerateNewKey(io.Reader, string) (*Key, error)
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GetKey(*uuid.UUID, string) (*Key, error) // key from id and auth string
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StoreKey(*Key, string) error // store key optionally using auth string
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DeleteKey(*uuid.UUID, string) error // delete key by id and auth string
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}
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type keyStorePlain struct {
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keysDirPath string
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}
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// TODO: copied from cmd/ethereum/flags.go
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func DefaultDataDir() string {
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usr, _ := user.Current()
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return path.Join(usr.HomeDir, ".ethereum")
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}
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func NewKeyStorePlain(path string) KeyStore2 {
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return &keyStorePlain{path}
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}
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func (ks keyStorePlain) GenerateNewKey(rand io.Reader, auth string) (key *Key, err error) {
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return GenerateNewKeyDefault(ks, rand, auth)
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}
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func GenerateNewKeyDefault(ks KeyStore2, rand io.Reader, auth string) (key *Key, err error) {
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defer func() {
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if r := recover(); r != nil {
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err = fmt.Errorf("GenerateNewKey error: %v", r)
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}
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}()
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key = NewKey(rand)
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err = ks.StoreKey(key, auth)
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return key, err
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}
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func (ks keyStorePlain) GetKey(keyId *uuid.UUID, auth string) (key *Key, err error) {
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fileContent, err := GetKeyFile(ks.keysDirPath, keyId)
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if err != nil {
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return nil, err
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}
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key = new(Key)
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err = json.Unmarshal(fileContent, key)
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return key, err
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}
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func (ks keyStorePlain) StoreKey(key *Key, auth string) (err error) {
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keyJSON, err := json.Marshal(key)
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if err != nil {
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return err
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}
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err = WriteKeyFile(key.Id.String(), ks.keysDirPath, keyJSON)
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return err
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}
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func (ks keyStorePlain) DeleteKey(keyId *uuid.UUID, auth string) (err error) {
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keyDirPath := path.Join(ks.keysDirPath, keyId.String())
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err = os.RemoveAll(keyDirPath)
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return err
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}
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func GetKeyFile(keysDirPath string, keyId *uuid.UUID) (fileContent []byte, err error) {
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id := keyId.String()
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return ioutil.ReadFile(path.Join(keysDirPath, id, id))
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}
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func WriteKeyFile(id string, keysDirPath string, content []byte) (err error) {
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keyDirPath := path.Join(keysDirPath, id)
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keyFilePath := path.Join(keyDirPath, id)
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err = os.MkdirAll(keyDirPath, 0700) // read, write and dir search for user
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if err != nil {
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return err
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}
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return ioutil.WriteFile(keyFilePath, content, 0600) // read, write for user
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}
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